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TEM images of the three kinds of QDs and three kinds of QD fluorescence biological probes [(A) the green QD; (B) the green QD-E. coliO157:H7 apt; (C) the red QD; (D) the red QD-S. aureus apt; (E) the blue QD; and (F) the blue QD-V. parahaemolyticus apt].
